NR 661.1056NR 661.1056 Standards: open-ended valves or lines. NR 661.1056(1)(a)(a) Each open-ended valve or line shall be equipped with a cap, blind flange, plug, or a second valve. NR 661.1056(1)(b)(b) The cap, blind flange, plug, or second valve shall seal the open end at all times except during operations requiring hazardous secondary material stream flow through the open-ended valve or line. NR 661.1056(2)(2) Each open-ended valve or line equipped with a second valve shall be operated in a manner such that the valve on the hazardous secondary material stream end is closed before the second valve is closed. NR 661.1056(3)(3) When a double block and bleed system is being used, the bleed valve or line may remain open during operations that require venting the line between the block valves but shall comply with sub. (1) at all other times. NR 661.1056 HistoryHistory: CR 19-082: cr. Register August 2020 No. 776, eff. 9-1-20. NR 661.1057NR 661.1057 Standards: valves in gas/vapor service or in light liquid service. NR 661.1057(2)(2) If an instrument reading of 10,000 ppm or greater is measured, a leak is detected. NR 661.1057(3)(a)(a) Any valve for which a leak is not detected for 2 successive months may be monitored the first month of every succeeding quarter, beginning with the next quarter, until a leak is detected. NR 661.1057(3)(b)(b) If a leak is detected, the valve shall be monitored monthly until a leak is not detected for 2 successive months. NR 661.1057(4)(a)(a) When a leak is detected, it shall be repaired as soon as practicable, but no later than 15 calendar days after the leak is detected, except as provided in s. NR 661.1059. NR 661.1057(4)(b)(b) A first attempt at repair shall be made no later than 5 calendar days after each leak is detected. NR 661.1057(5)(5) First attempts at repair include the following best practices where practicable: NR 661.1057(6)(6) Any valve that is designated, as described in s. NR 661.1064 (7) (b), for no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, is exempt from the requirements under sub. (1) if the valve meets all of the following requirements: NR 661.1057(6)(a)(a) Has no external actuating mechanism in contact with the hazardous secondary material stream. NR 661.1057(6)(c)(c) Is tested for compliance with par. (b) initially upon designation, annually, and at other times as requested by the department. NR 661.1057(7)(7) Any valve that is designated, as described in s. NR 661.1064 (8) (a), as an unsafe-to-monitor valve is exempt from the requirements under sub. (1) if all of the following requirements are met: NR 661.1057(7)(a)(a) The remanufacturer or other person that stores or treats the hazardous secondary material determines that the valve is unsafe to monitor because monitoring personnel would be exposed to an immediate danger as a consequence of complying with sub. (1). NR 661.1057(7)(b)(b) The remanufacturer or other person that stores or treats the hazardous secondary material adheres to a written plan that requires monitoring of the valve as frequently as practicable during safe-to-monitor times. NR 661.1057(8)(8) Any valve that is designated, as described in s. NR 661.1064 (8) (b), as a difficult-to-monitor valve is exempt from the requirements under sub. (1) if all of the following requirements are met: